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crake

In England, ? – 19ᵗʰ century, a unit for describing a quantity of window glass.

examples

CRAKE, of window-glass, is a quantity of panes of glass packed in a wooden case, weighing about ten stone.

Kelly (1835) vol 2. page 275.

I seed him goin' down th' street with half a crake o' glass on a frame under his arm.

C. F. Marsh.
“Broken Glass: The Story of a Misunderstanding.”
Short Stories. A Magazine of Select Fiction, Volume LI, 1903. Page 46.
The same story appeared in Longman's Magazine, pg 170 (1903)